30-07-2015 дата публикации
Номер: KR101540953B1
Принадлежит:
LEE, JUN SEO
The present invention relates to a lever type experimental device capable of experimenting all of first type, second type, and third type principles of a lever with one experimental device. The configuration of the present invention comprises: a support unit positioned on a floor; a support rod vertically installed on the support unit; and a horizontal lever of which a center portion is fixated to the support rod with a hinge shaft to horizontally installed to be rotated and where a plurality of hook insertion holes are formed at constant intervals. An upper lever is installed in the upper portion of the support rod and spaced from an upper side of the horizontal lever and of which the center portion is fixated to a second hinge shaft to be rotated and having a plurality of hook fixing holes at constant intervals. A connection rope, of which both ends are inserted into the hook insertion hole and the hook fixing hole, connecting the horizontal lever and the upper lever to each other is ...
Подробнее